chemical formula, Chemistry

copper reacts with oxygen to form two oxides es x and y on analysis 1.535 g of x yielded 1.365 g of copper and 1.450 g of y yielded 1.160 g of copper(1) determine the chemical formula of x and y (2) calculate the mass copper which can react with 0.5 g of oxygen to yield x and y(ii)which of the laws of chemical combination is illustrated by the result above